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                  <a href="#glib-Miscellaneous-Utility-Functions.description" class="shortcut">Description</a></span>
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<h2><span class="refentrytitle"><a name="glib-Miscellaneous-Utility-Functions.top_of_page"></a>Miscellaneous Utility Functions</span></h2>
<p>Miscellaneous Utility Functions — a selection of portable utility functions</p>
</td>
<td class="gallery_image" valign="top" align="right"></td>
</tr></table></div>
<div class="refsect1">
<a name="glib-Miscellaneous-Utility-Functions.functions"></a><h2>Functions</h2>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="functions_return">
<col class="functions_name">
</colgroup>
<tbody>
<tr>
<td class="function_type">const <a class="link" href="glib-Basic-Types.html#gchar" title="gchar"><span class="returnvalue">gchar</span></a> *
</td>
<td class="function_name">
<a class="link" href="glib-Miscellaneous-Utility-Functions.html#g-get-application-name" title="g_get_application_name ()">g_get_application_name</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="glib-Miscellaneous-Utility-Functions.html#g-set-application-name" title="g_set_application_name ()">g_set_application_name</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">const <a class="link" href="glib-Basic-Types.html#gchar" title="gchar"><span class="returnvalue">gchar</span></a> *
</td>
<td class="function_name">
<a class="link" href="glib-Miscellaneous-Utility-Functions.html#g-get-prgname" title="g_get_prgname ()">g_get_prgname</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="glib-Miscellaneous-Utility-Functions.html#g-set-prgname" title="g_set_prgname ()">g_set_prgname</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="glib-Basic-Types.html#gchar" title="gchar"><span class="returnvalue">gchar</span></a> **
</td>
<td class="function_name">
<a class="link" href="glib-Miscellaneous-Utility-Functions.html#g-get-environ" title="g_get_environ ()">g_get_environ</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">const <a class="link" href="glib-Basic-Types.html#gchar" title="gchar"><span class="returnvalue">gchar</span></a> *
</td>
<td class="function_name">
<a class="link" href="glib-Miscellaneous-Utility-Functions.html#g-environ-getenv" title="g_environ_getenv ()">g_environ_getenv</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="glib-Basic-Types.html#gchar" title="gchar"><span class="returnvalue">gchar</span></a> **
</td>
<td class="function_name">
<a class="link" href="glib-Miscellaneous-Utility-Functions.html#g-environ-setenv" title="g_environ_setenv ()">g_environ_setenv</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="glib-Basic-Types.html#gchar" title="gchar"><span class="returnvalue">gchar</span></a> **
</td>
<td class="function_name">
<a class="link" href="glib-Miscellaneous-Utility-Functions.html#g-environ-unsetenv" title="g_environ_unsetenv ()">g_environ_unsetenv</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">const <a class="link" href="glib-Basic-Types.html#gchar" title="gchar"><span class="returnvalue">gchar</span></a> *
</td>
<td class="function_name">
<a class="link" href="glib-Miscellaneous-Utility-Functions.html#g-getenv" title="g_getenv ()">g_getenv</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="glib-Basic-Types.html#gboolean" title="gboolean"><span class="returnvalue">gboolean</span></a>
</td>
<td class="function_name">
<a class="link" href="glib-Miscellaneous-Utility-Functions.html#g-setenv" title="g_setenv ()">g_setenv</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="glib-Miscellaneous-Utility-Functions.html#g-unsetenv" title="g_unsetenv ()">g_unsetenv</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="glib-Basic-Types.html#gchar" title="gchar"><span class="returnvalue">gchar</span></a> **
</td>
<td class="function_name">
<a class="link" href="glib-Miscellaneous-Utility-Functions.html#g-listenv" title="g_listenv ()">g_listenv</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">const <a class="link" href="glib-Basic-Types.html#gchar" title="gchar"><span class="returnvalue">gchar</span></a> *
</td>
<td class="function_name">
<a class="link" href="glib-Miscellaneous-Utility-Functions.html#g-get-user-name" title="g_get_user_name ()">g_get_user_name</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">const <a class="link" href="glib-Basic-Types.html#gchar" title="gchar"><span class="returnvalue">gchar</span></a> *
</td>
<td class="function_name">
<a class="link" href="glib-Miscellaneous-Utility-Functions.html#g-get-real-name" title="g_get_real_name ()">g_get_real_name</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">const <a class="link" href="glib-Basic-Types.html#gchar" title="gchar"><span class="returnvalue">gchar</span></a> *
</td>
<td class="function_name">
<a class="link" href="glib-Miscellaneous-Utility-Functions.html#g-get-user-cache-dir" title="g_get_user_cache_dir ()">g_get_user_cache_dir</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">const <a class="link" href="glib-Basic-Types.html#gchar" title="gchar"><span class="returnvalue">gchar</span></a> *
</td>
<td class="function_name">
<a class="link" href="glib-Miscellaneous-Utility-Functions.html#g-get-user-data-dir" title="g_get_user_data_dir ()">g_get_user_data_dir</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">const <a class="link" href="glib-Basic-Types.html#gchar" title="gchar"><span class="returnvalue">gchar</span></a> *
</td>
<td class="function_name">
<a class="link" href="glib-Miscellaneous-Utility-Functions.html#g-get-user-config-dir" title="g_get_user_config_dir ()">g_get_user_config_dir</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">const <a class="link" href="glib-Basic-Types.html#gchar" title="gchar"><span class="returnvalue">gchar</span></a> *
</td>
<td class="function_name">
<a class="link" href="glib-Miscellaneous-Utility-Functions.html#g-get-user-runtime-dir" title="g_get_user_runtime_dir ()">g_get_user_runtime_dir</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">const <a class="link" href="glib-Basic-Types.html#gchar" title="gchar"><span class="returnvalue">gchar</span></a> *
</td>
<td class="function_name">
<a class="link" href="glib-Miscellaneous-Utility-Functions.html#g-get-user-special-dir" title="g_get_user_special_dir ()">g_get_user_special_dir</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">const <a class="link" href="glib-Basic-Types.html#gchar" title="gchar"><span class="returnvalue">gchar</span></a> * const *
</td>
<td class="function_name">
<a class="link" href="glib-Miscellaneous-Utility-Functions.html#g-get-system-data-dirs" title="g_get_system_data_dirs ()">g_get_system_data_dirs</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">const <a class="link" href="glib-Basic-Types.html#gchar" title="gchar"><span class="returnvalue">gchar</span></a> * const *
</td>
<td class="function_name">
<a class="link" href="glib-Miscellaneous-Utility-Functions.html#g-get-system-config-dirs" title="g_get_system_config_dirs ()">g_get_system_config_dirs</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="glib-Miscellaneous-Utility-Functions.html#g-reload-user-special-dirs-cache" title="g_reload_user_special_dirs_cache ()">g_reload_user_special_dirs_cache</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">const <a class="link" href="glib-Basic-Types.html#gchar" title="gchar"><span class="returnvalue">gchar</span></a> *
</td>
<td class="function_name">
<a class="link" href="glib-Miscellaneous-Utility-Functions.html#g-get-host-name" title="g_get_host_name ()">g_get_host_name</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">const <a class="link" href="glib-Basic-Types.html#gchar" title="gchar"><span class="returnvalue">gchar</span></a> *
</td>
<td class="function_name">
<a class="link" href="glib-Miscellaneous-Utility-Functions.html#g-get-home-dir" title="g_get_home_dir ()">g_get_home_dir</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">const <a class="link" href="glib-Basic-Types.html#gchar" title="gchar"><span class="returnvalue">gchar</span></a> *
</td>
<td class="function_name">
<a class="link" href="glib-Miscellaneous-Utility-Functions.html#g-get-tmp-dir" title="g_get_tmp_dir ()">g_get_tmp_dir</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="glib-Basic-Types.html#gchar" title="gchar"><span class="returnvalue">gchar</span></a> *
</td>
<td class="function_name">
<a class="link" href="glib-Miscellaneous-Utility-Functions.html#g-get-current-dir" title="g_get_current_dir ()">g_get_current_dir</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">const <a class="link" href="glib-Basic-Types.html#gchar" title="gchar"><span class="returnvalue">gchar</span></a> *
</td>
<td class="function_name">
<a class="link" href="glib-Miscellaneous-Utility-Functions.html#g-basename" title="g_basename ()">g_basename</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="glib-Basic-Types.html#gboolean" title="gboolean"><span class="returnvalue">gboolean</span></a>
</td>
<td class="function_name">
<a class="link" href="glib-Miscellaneous-Utility-Functions.html#g-path-is-absolute" title="g_path_is_absolute ()">g_path_is_absolute</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">const <a class="link" href="glib-Basic-Types.html#gchar" title="gchar"><span class="returnvalue">gchar</span></a> *
</td>
<td class="function_name">
<a class="link" href="glib-Miscellaneous-Utility-Functions.html#g-path-skip-root" title="g_path_skip_root ()">g_path_skip_root</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="glib-Basic-Types.html#gchar" title="gchar"><span class="returnvalue">gchar</span></a> *
</td>
<td class="function_name">
<a class="link" href="glib-Miscellaneous-Utility-Functions.html#g-path-get-basename" title="g_path_get_basename ()">g_path_get_basename</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="glib-Basic-Types.html#gchar" title="gchar"><span class="returnvalue">gchar</span></a> *
</td>
<td class="function_name">
<a class="link" href="glib-Miscellaneous-Utility-Functions.html#g-path-get-dirname" title="g_path_get_dirname ()">g_path_get_dirname</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="glib-Basic-Types.html#gchar" title="gchar"><span class="returnvalue">gchar</span></a> *
</td>
<td class="function_name">
<a class="link" href="glib-Miscellaneous-Utility-Functions.html#g-build-filename" title="g_build_filename ()">g_build_filename</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="glib-Basic-Types.html#gchar" title="gchar"><span class="returnvalue">gchar</span></a> *
</td>
<td class="function_name">
<a class="link" href="glib-Miscellaneous-Utility-Functions.html#g-build-filenamev" title="g_build_filenamev ()">g_build_filenamev</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="glib-Basic-Types.html#gchar" title="gchar"><span class="returnvalue">gchar</span></a> *
</td>
<td class="function_name">
<a class="link" href="glib-Miscellaneous-Utility-Functions.html#g-build-path" title="g_build_path ()">g_build_path</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="glib-Basic-Types.html#gchar" title="gchar"><span class="returnvalue">gchar</span></a> *
</td>
<td class="function_name">
<a class="link" href="glib-Miscellaneous-Utility-Functions.html#g-build-pathv" title="g_build_pathv ()">g_build_pathv</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="glib-Basic-Types.html#gchar" title="gchar"><span class="returnvalue">gchar</span></a> *
</td>
<td class="function_name">
<a class="link" href="glib-Miscellaneous-Utility-Functions.html#g-format-size" title="g_format_size ()">g_format_size</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="glib-Basic-Types.html#gchar" title="gchar"><span class="returnvalue">gchar</span></a> *
</td>
<td class="function_name">
<a class="link" href="glib-Miscellaneous-Utility-Functions.html#g-format-size-full" title="g_format_size_full ()">g_format_size_full</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="glib-Basic-Types.html#gchar" title="gchar"><span class="returnvalue">gchar</span></a> *
</td>
<td class="function_name">
<a class="link" href="glib-Miscellaneous-Utility-Functions.html#g-format-size-for-display" title="g_format_size_for_display ()">g_format_size_for_display</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="glib-Basic-Types.html#gchar" title="gchar"><span class="returnvalue">gchar</span></a> *
</td>
<td class="function_name">
<a class="link" href="glib-Miscellaneous-Utility-Functions.html#g-find-program-in-path" title="g_find_program_in_path ()">g_find_program_in_path</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="define_keyword">#define</td>
<td class="function_name">
<a class="link" href="glib-Miscellaneous-Utility-Functions.html#g-bit-nth-lsf" title="g_bit_nth_lsf()">g_bit_nth_lsf</a><span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="define_keyword">#define</td>
<td class="function_name">
<a class="link" href="glib-Miscellaneous-Utility-Functions.html#g-bit-nth-msf" title="g_bit_nth_msf()">g_bit_nth_msf</a><span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="define_keyword">#define</td>
<td class="function_name">
<a class="link" href="glib-Miscellaneous-Utility-Functions.html#g-bit-storage" title="g_bit_storage()">g_bit_storage</a><span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="glib-Basic-Types.html#guint" title="guint ()"><span class="returnvalue">guint</span></a>
</td>
<td class="function_name">
<a class="link" href="glib-Miscellaneous-Utility-Functions.html#g-spaced-primes-closest" title="g_spaced_primes_closest ()">g_spaced_primes_closest</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="glib-Miscellaneous-Utility-Functions.html#g-atexit" title="g_atexit ()">g_atexit</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="glib-Basic-Types.html#guint" title="guint ()"><span class="returnvalue">guint</span></a>
</td>
<td class="function_name">
<a class="link" href="glib-Miscellaneous-Utility-Functions.html#g-parse-debug-string" title="g_parse_debug_string ()">g_parse_debug_string</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<span class="c_punctuation">(</span><a class="link" href="glib-Miscellaneous-Utility-Functions.html#GVoidFunc" title="GVoidFunc ()">*GVoidFunc</a><span class="c_punctuation">)</span> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<span class="c_punctuation">(</span><a class="link" href="glib-Miscellaneous-Utility-Functions.html#GFreeFunc" title="GFreeFunc ()">*GFreeFunc</a><span class="c_punctuation">)</span> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="glib-Miscellaneous-Utility-Functions.html#g-qsort-with-data" title="g_qsort_with_data ()">g_qsort_with_data</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="glib-Miscellaneous-Utility-Functions.html#g-nullify-pointer" title="g_nullify_pointer ()">g_nullify_pointer</a> <span class="c_punctuation">()</span>
</td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect1">
<a name="glib-Miscellaneous-Utility-Functions.other"></a><h2>Types and Values</h2>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="name">
<col class="description">
</colgroup>
<tbody>
<tr>
<td class="datatype_keyword">enum</td>
<td class="function_name"><a class="link" href="glib-Miscellaneous-Utility-Functions.html#GUserDirectory" title="enum GUserDirectory">GUserDirectory</a></td>
</tr>
<tr>
<td class="define_keyword">#define</td>
<td class="function_name"><a class="link" href="glib-Miscellaneous-Utility-Functions.html#g-dirname" title="g_dirname">g_dirname</a></td>
</tr>
<tr>
<td class="datatype_keyword">enum</td>
<td class="function_name"><a class="link" href="glib-Miscellaneous-Utility-Functions.html#GFormatSizeFlags" title="enum GFormatSizeFlags">GFormatSizeFlags</a></td>
</tr>
<tr>
<td class="datatype_keyword">struct</td>
<td class="function_name"><a class="link" href="glib-Miscellaneous-Utility-Functions.html#GDebugKey" title="struct GDebugKey">GDebugKey</a></td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect1">
<a name="glib-Miscellaneous-Utility-Functions.includes"></a><h2>Includes</h2>
<pre class="synopsis">#include &lt;glib.h&gt;
</pre>
</div>
<div class="refsect1">
<a name="glib-Miscellaneous-Utility-Functions.description"></a><h2>Description</h2>
<p>These are portable utility functions.</p>
</div>
<div class="refsect1">
<a name="glib-Miscellaneous-Utility-Functions.functions_details"></a><h2>Functions</h2>
<div class="refsect2">
<a name="g-get-application-name"></a><h3>g_get_application_name ()</h3>
<pre class="programlisting">const <a class="link" href="glib-Basic-Types.html#gchar" title="gchar"><span class="returnvalue">gchar</span></a> *
g_get_application_name (<em class="parameter"><code><span class="type">void</span></code></em>);</pre>
<p>Gets a human-readable name for the application, as set by
<a class="link" href="glib-Miscellaneous-Utility-Functions.html#g-set-application-name" title="g_set_application_name ()"><code class="function">g_set_application_name()</code></a>. This name should be localized if
possible, and is intended for display to the user.  Contrast with
<a class="link" href="glib-Miscellaneous-Utility-Functions.html#g-get-prgname" title="g_get_prgname ()"><code class="function">g_get_prgname()</code></a>, which gets a non-localized name. If
<a class="link" href="glib-Miscellaneous-Utility-Functions.html#g-set-application-name" title="g_set_application_name ()"><code class="function">g_set_application_name()</code></a> has not been called, returns the result of
<a class="link" href="glib-Miscellaneous-Utility-Functions.html#g-get-prgname" title="g_get_prgname ()"><code class="function">g_get_prgname()</code></a> (which may be <a class="link" href="glib-Standard-Macros.html#NULL:CAPS" title="NULL"><code class="literal">NULL</code></a> if <a class="link" href="glib-Miscellaneous-Utility-Functions.html#g-set-prgname" title="g_set_prgname ()"><code class="function">g_set_prgname()</code></a> has also not
been called).</p>
<div class="refsect3">
<a name="g-get-application-name.returns"></a><h4>Returns</h4>
<p> human-readable application name. may return <a class="link" href="glib-Standard-Macros.html#NULL:CAPS" title="NULL"><code class="literal">NULL</code></a></p>
</div>
<p class="since">Since: <a class="link" href="api-index-2-2.html#api-index-2.2">2.2</a></p>
</div>
<hr>
<div class="refsect2">
<a name="g-set-application-name"></a><h3>g_set_application_name ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
g_set_application_name (<em class="parameter"><code>const <a class="link" href="glib-Basic-Types.html#gchar" title="gchar"><span class="type">gchar</span></a> *application_name</code></em>);</pre>
<p>Sets a human-readable name for the application. This name should be
localized if possible, and is intended for display to the user.
Contrast with <a class="link" href="glib-Miscellaneous-Utility-Functions.html#g-set-prgname" title="g_set_prgname ()"><code class="function">g_set_prgname()</code></a>, which sets a non-localized name.
<a class="link" href="glib-Miscellaneous-Utility-Functions.html#g-set-prgname" title="g_set_prgname ()"><code class="function">g_set_prgname()</code></a> will be called automatically by <code class="function">gtk_init()</code>,
but <a class="link" href="glib-Miscellaneous-Utility-Functions.html#g-set-application-name" title="g_set_application_name ()"><code class="function">g_set_application_name()</code></a> will not.</p>
<p>Note that for thread safety reasons, this function can only
be called once.</p>
<p>The application name will be used in contexts such as error messages,
or when displaying an application's name in the task list.</p>
<div class="refsect3">
<a name="g-set-application-name.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>application_name</p></td>
<td class="parameter_description"><p>localized name of the application</p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<p class="since">Since: <a class="link" href="api-index-2-2.html#api-index-2.2">2.2</a></p>
</div>
<hr>
<div class="refsect2">
<a name="g-get-prgname"></a><h3>g_get_prgname ()</h3>
<pre class="programlisting">const <a class="link" href="glib-Basic-Types.html#gchar" title="gchar"><span class="returnvalue">gchar</span></a> *
g_get_prgname (<em class="parameter"><code><span class="type">void</span></code></em>);</pre>
<p>Gets the name of the program. This name should not be localized,
in contrast to <a class="link" href="glib-Miscellaneous-Utility-Functions.html#g-get-application-name" title="g_get_application_name ()"><code class="function">g_get_application_name()</code></a>.</p>
<p>If you are using GDK or GTK+ the program name is set in <code class="function">gdk_init()</code>, 
which is called by <code class="function">gtk_init()</code>. The program name is found by taking 
the last component of <em class="parameter"><code>argv</code></em>
[0].</p>
<div class="refsect3">
<a name="g-get-prgname.returns"></a><h4>Returns</h4>
<p> the name of the program. The returned string belongs
to GLib and must not be modified or freed.</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="g-set-prgname"></a><h3>g_set_prgname ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
g_set_prgname (<em class="parameter"><code>const <a class="link" href="glib-Basic-Types.html#gchar" title="gchar"><span class="type">gchar</span></a> *prgname</code></em>);</pre>
<p>Sets the name of the program. This name should not be localized,
in contrast to <a class="link" href="glib-Miscellaneous-Utility-Functions.html#g-set-application-name" title="g_set_application_name ()"><code class="function">g_set_application_name()</code></a>.</p>
<p>Note that for thread-safety reasons this function can only be called once.</p>
<div class="refsect3">
<a name="g-set-prgname.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>prgname</p></td>
<td class="parameter_description"><p>the name of the program.</p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="g-get-environ"></a><h3>g_get_environ ()</h3>
<pre class="programlisting"><a class="link" href="glib-Basic-Types.html#gchar" title="gchar"><span class="returnvalue">gchar</span></a> **
g_get_environ (<em class="parameter"><code><span class="type">void</span></code></em>);</pre>
<p>Gets the list of environment variables for the current process.</p>
<p>The list is <a class="link" href="glib-Standard-Macros.html#NULL:CAPS" title="NULL"><code class="literal">NULL</code></a> terminated and each item in the list is of the
form 'NAME=VALUE'.</p>
<p>This is equivalent to direct access to the 'environ' global variable,
except portable.</p>
<p>The return value is freshly allocated and it should be freed with
<a class="link" href="glib-String-Utility-Functions.html#g-strfreev" title="g_strfreev ()"><code class="function">g_strfreev()</code></a> when it is no longer needed.</p>
<div class="refsect3">
<a name="g-get-environ.returns"></a><h4>Returns</h4>
<p> the list of
environment variables. </p>
<p><span class="annotation">[<acronym title="Parameter points to an array of items."><span class="acronym">array</span></acronym> zero-terminated=1][<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span></p>
</div>
<p class="since">Since: <a class="link" href="api-index-2-28.html#api-index-2.28">2.28</a></p>
</div>
<hr>
<div class="refsect2">
<a name="g-environ-getenv"></a><h3>g_environ_getenv ()</h3>
<pre class="programlisting">const <a class="link" href="glib-Basic-Types.html#gchar" title="gchar"><span class="returnvalue">gchar</span></a> *
g_environ_getenv (<em class="parameter"><code><a class="link" href="glib-Basic-Types.html#gchar" title="gchar"><span class="type">gchar</span></a> **envp</code></em>,
                  <em class="parameter"><code>const <a class="link" href="glib-Basic-Types.html#gchar" title="gchar"><span class="type">gchar</span></a> *variable</code></em>);</pre>
<p>Returns the value of the environment variable <em class="parameter"><code>variable</code></em>
 in the
provided list <em class="parameter"><code>envp</code></em>
.</p>
<div class="refsect3">
<a name="g-environ-getenv.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>envp</p></td>
<td class="parameter_description"><p> an environment
list (eg, as returned from <a class="link" href="glib-Miscellaneous-Utility-Functions.html#g-get-environ" title="g_get_environ ()"><code class="function">g_get_environ()</code></a>), or <a class="link" href="glib-Standard-Macros.html#NULL:CAPS" title="NULL"><code class="literal">NULL</code></a>
for an empty environment list. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>][<acronym title="Parameter points to an array of items."><span class="acronym">array</span></acronym> zero-terminated=1][<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>variable</p></td>
<td class="parameter_description"><p>the environment variable to get</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="g-environ-getenv.returns"></a><h4>Returns</h4>
<p> the value of the environment variable, or <a class="link" href="glib-Standard-Macros.html#NULL:CAPS" title="NULL"><code class="literal">NULL</code></a> if
the environment variable is not set in <em class="parameter"><code>envp</code></em>
. The returned
string is owned by <em class="parameter"><code>envp</code></em>
, and will be freed if <em class="parameter"><code>variable</code></em>
is
set or unset again.</p>
</div>
<p class="since">Since: <a class="link" href="api-index-2-32.html#api-index-2.32">2.32</a></p>
</div>
<hr>
<div class="refsect2">
<a name="g-environ-setenv"></a><h3>g_environ_setenv ()</h3>
<pre class="programlisting"><a class="link" href="glib-Basic-Types.html#gchar" title="gchar"><span class="returnvalue">gchar</span></a> **
g_environ_setenv (<em class="parameter"><code><a class="link" href="glib-Basic-Types.html#gchar" title="gchar"><span class="type">gchar</span></a> **envp</code></em>,
                  <em class="parameter"><code>const <a class="link" href="glib-Basic-Types.html#gchar" title="gchar"><span class="type">gchar</span></a> *variable</code></em>,
                  <em class="parameter"><code>const <a class="link" href="glib-Basic-Types.html#gchar" title="gchar"><span class="type">gchar</span></a> *value</code></em>,
                  <em class="parameter"><code><a class="link" href="glib-Basic-Types.html#gboolean" title="gboolean"><span class="type">gboolean</span></a> overwrite</code></em>);</pre>
<p>Sets the environment variable <em class="parameter"><code>variable</code></em>
 in the provided list
<em class="parameter"><code>envp</code></em>
 to <em class="parameter"><code>value</code></em>
.</p>
<div class="refsect3">
<a name="g-environ-setenv.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>envp</p></td>
<td class="parameter_description"><p> an
environment list that can be freed using <a class="link" href="glib-String-Utility-Functions.html#g-strfreev" title="g_strfreev ()"><code class="function">g_strfreev()</code></a> (e.g., as
returned from <a class="link" href="glib-Miscellaneous-Utility-Functions.html#g-get-environ" title="g_get_environ ()"><code class="function">g_get_environ()</code></a>), or <a class="link" href="glib-Standard-Macros.html#NULL:CAPS" title="NULL"><code class="literal">NULL</code></a> for an empty
environment list. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>][<acronym title="Parameter points to an array of items."><span class="acronym">array</span></acronym> zero-terminated=1][<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>variable</p></td>
<td class="parameter_description"><p>the environment variable to set, must not contain '='</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>value</p></td>
<td class="parameter_description"><p>the value for to set the variable to</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>overwrite</p></td>
<td class="parameter_description"><p>whether to change the variable if it already exists</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="g-environ-setenv.returns"></a><h4>Returns</h4>
<p> the
updated environment list. Free it using <a class="link" href="glib-String-Utility-Functions.html#g-strfreev" title="g_strfreev ()"><code class="function">g_strfreev()</code></a>. </p>
<p><span class="annotation">[<acronym title="Parameter points to an array of items."><span class="acronym">array</span></acronym> zero-terminated=1][<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span></p>
</div>
<p class="since">Since: <a class="link" href="api-index-2-32.html#api-index-2.32">2.32</a></p>
</div>
<hr>
<div class="refsect2">
<a name="g-environ-unsetenv"></a><h3>g_environ_unsetenv ()</h3>
<pre class="programlisting"><a class="link" href="glib-Basic-Types.html#gchar" title="gchar"><span class="returnvalue">gchar</span></a> **
g_environ_unsetenv (<em class="parameter"><code><a class="link" href="glib-Basic-Types.html#gchar" title="gchar"><span class="type">gchar</span></a> **envp</code></em>,
                    <em class="parameter"><code>const <a class="link" href="glib-Basic-Types.html#gchar" title="gchar"><span class="type">gchar</span></a> *variable</code></em>);</pre>
<p>Removes the environment variable <em class="parameter"><code>variable</code></em>
 from the provided
environment <em class="parameter"><code>envp</code></em>
.</p>
<div class="refsect3">
<a name="g-environ-unsetenv.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>envp</p></td>
<td class="parameter_description"><p> an environment
list that can be freed using <a class="link" href="glib-String-Utility-Functions.html#g-strfreev" title="g_strfreev ()"><code class="function">g_strfreev()</code></a> (e.g., as returned from <a class="link" href="glib-Miscellaneous-Utility-Functions.html#g-get-environ" title="g_get_environ ()"><code class="function">g_get_environ()</code></a>),
or <a class="link" href="glib-Standard-Macros.html#NULL:CAPS" title="NULL"><code class="literal">NULL</code></a> for an empty environment list. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>][<acronym title="Parameter points to an array of items."><span class="acronym">array</span></acronym> zero-terminated=1][<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>variable</p></td>
<td class="parameter_description"><p>the environment variable to remove, must not contain '='</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="g-environ-unsetenv.returns"></a><h4>Returns</h4>
<p> the
updated environment list. Free it using <a class="link" href="glib-String-Utility-Functions.html#g-strfreev" title="g_strfreev ()"><code class="function">g_strfreev()</code></a>. </p>
<p><span class="annotation">[<acronym title="Parameter points to an array of items."><span class="acronym">array</span></acronym> zero-terminated=1][<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span></p>
</div>
<p class="since">Since: <a class="link" href="api-index-2-32.html#api-index-2.32">2.32</a></p>
</div>
<hr>
<div class="refsect2">
<a name="g-getenv"></a><h3>g_getenv ()</h3>
<pre class="programlisting">const <a class="link" href="glib-Basic-Types.html#gchar" title="gchar"><span class="returnvalue">gchar</span></a> *
g_getenv (<em class="parameter"><code>const <a class="link" href="glib-Basic-Types.html#gchar" title="gchar"><span class="type">gchar</span></a> *variable</code></em>);</pre>
<p>Returns the value of an environment variable.</p>
<p>On UNIX, the name and value are byte strings which might or might not
be in some consistent character set and encoding. On Windows, they are
in UTF-8.
On Windows, in case the environment variable's value contains
references to other environment variables, they are expanded.</p>
<div class="refsect3">
<a name="g-getenv.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>variable</p></td>
<td class="parameter_description"><p>the environment variable to get</p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="g-getenv.returns"></a><h4>Returns</h4>
<p> the value of the environment variable, or <a class="link" href="glib-Standard-Macros.html#NULL:CAPS" title="NULL"><code class="literal">NULL</code></a> if
the environment variable is not found. The returned string
may be overwritten by the next call to <a class="link" href="glib-Miscellaneous-Utility-Functions.html#g-getenv" title="g_getenv ()"><code class="function">g_getenv()</code></a>, <a class="link" href="glib-Miscellaneous-Utility-Functions.html#g-setenv" title="g_setenv ()"><code class="function">g_setenv()</code></a>
or <a class="link" href="glib-Miscellaneous-Utility-Functions.html#g-unsetenv" title="g_unsetenv ()"><code class="function">g_unsetenv()</code></a>.</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="g-setenv"></a><h3>g_setenv ()</h3>
<pre class="programlisting"><a class="link" href="glib-Basic-Types.html#gboolean" title="gboolean"><span class="returnvalue">gboolean</span></a>
g_setenv (<em class="parameter"><code>const <a class="link" href="glib-Basic-Types.html#gchar" title="gchar"><span class="type">gchar</span></a> *variable</code></em>,
          <em class="parameter"><code>const <a class="link" href="glib-Basic-Types.html#gchar" title="gchar"><span class="type">gchar</span></a> *value</code></em>,
          <em class="parameter"><code><a class="link" href="glib-Basic-Types.html#gboolean" title="gboolean"><span class="type">gboolean</span></a> overwrite</code></em>);</pre>
<p>Sets an environment variable. On UNIX, both the variable's name and
value can be arbitrary byte strings, except that the variable's name
cannot contain '='. On Windows, they should be in UTF-8.</p>
<p>Note that on some systems, when variables are overwritten, the memory
used for the previous variables and its value isn't reclaimed.</p>
<p>You should be mindful of the fact that environment variable handling
in UNIX is not thread-safe, and your program may crash if one thread
calls <a class="link" href="glib-Miscellaneous-Utility-Functions.html#g-setenv" title="g_setenv ()"><code class="function">g_setenv()</code></a> while another thread is calling <code class="function">getenv()</code>. (And note
that many functions, such as <code class="function">gettext()</code>, call <code class="function">getenv()</code> internally.)
This function is only safe to use at the very start of your program,
before creating any other threads (or creating objects that create
worker threads of their own).</p>
<p>If you need to set up the environment for a child process, you can
use <a class="link" href="glib-Miscellaneous-Utility-Functions.html#g-get-environ" title="g_get_environ ()"><code class="function">g_get_environ()</code></a> to get an environment array, modify that with
<a class="link" href="glib-Miscellaneous-Utility-Functions.html#g-environ-setenv" title="g_environ_setenv ()"><code class="function">g_environ_setenv()</code></a> and <a class="link" href="glib-Miscellaneous-Utility-Functions.html#g-environ-unsetenv" title="g_environ_unsetenv ()"><code class="function">g_environ_unsetenv()</code></a>, and then pass that
array directly to <code class="function">execvpe()</code>, <a class="link" href="glib-Spawning-Processes.html#g-spawn-async" title="g_spawn_async ()"><code class="function">g_spawn_async()</code></a>, or the like.</p>
<div class="refsect3">
<a name="g-setenv.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>variable</p></td>
<td class="parameter_description"><p>the environment variable to set, must not contain '='.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>value</p></td>
<td class="parameter_description"><p>the value for to set the variable to.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>overwrite</p></td>
<td class="parameter_description"><p>whether to change the variable if it already exists.</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="g-setenv.returns"></a><h4>Returns</h4>
<p> <a class="link" href="glib-Standard-Macros.html#FALSE:CAPS" title="FALSE"><code class="literal">FALSE</code></a> if the environment variable couldn't be set.</p>
</div>
<p class="since">Since: <a class="link" href="api-index-2-4.html#api-index-2.4">2.4</a></p>
</div>
<hr>
<div class="refsect2">
<a name="g-unsetenv"></a><h3>g_unsetenv ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
g_unsetenv (<em class="parameter"><code>const <a class="link" href="glib-Basic-Types.html#gchar" title="gchar"><span class="type">gchar</span></a> *variable</code></em>);</pre>
<p>Removes an environment variable from the environment.</p>
<p>Note that on some systems, when variables are overwritten, the
memory used for the previous variables and its value isn't reclaimed.</p>
<p>You should be mindful of the fact that environment variable handling
in UNIX is not thread-safe, and your program may crash if one thread
calls <a class="link" href="glib-Miscellaneous-Utility-Functions.html#g-unsetenv" title="g_unsetenv ()"><code class="function">g_unsetenv()</code></a> while another thread is calling <code class="function">getenv()</code>. (And note
that many functions, such as <code class="function">gettext()</code>, call <code class="function">getenv()</code> internally.) This
function is only safe to use at the very start of your program, before
creating any other threads (or creating objects that create worker
threads of their own).</p>
<p>If you need to set up the environment for a child process, you can
use <a class="link" href="glib-Miscellaneous-Utility-Functions.html#g-get-environ" title="g_get_environ ()"><code class="function">g_get_environ()</code></a> to get an environment array, modify that with
<a class="link" href="glib-Miscellaneous-Utility-Functions.html#g-environ-setenv" title="g_environ_setenv ()"><code class="function">g_environ_setenv()</code></a> and <a class="link" href="glib-Miscellaneous-Utility-Functions.html#g-environ-unsetenv" title="g_environ_unsetenv ()"><code class="function">g_environ_unsetenv()</code></a>, and then pass that
array directly to <code class="function">execvpe()</code>, <a class="link" href="glib-Spawning-Processes.html#g-spawn-async" title="g_spawn_async ()"><code class="function">g_spawn_async()</code></a>, or the like.</p>
<div class="refsect3">
<a name="g-unsetenv.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>variable</p></td>
<td class="parameter_description"><p>the environment variable to remove, must not contain '='</p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<p class="since">Since: <a class="link" href="api-index-2-4.html#api-index-2.4">2.4</a></p>
</div>
<hr>
<div class="refsect2">
<a name="g-listenv"></a><h3>g_listenv ()</h3>
<pre class="programlisting"><a class="link" href="glib-Basic-Types.html#gchar" title="gchar"><span class="returnvalue">gchar</span></a> **
g_listenv (<em class="parameter"><code><span class="type">void</span></code></em>);</pre>
<p>Gets the names of all variables set in the environment.</p>
<p>Programs that want to be portable to Windows should typically use
this function and <a class="link" href="glib-Miscellaneous-Utility-Functions.html#g-getenv" title="g_getenv ()"><code class="function">g_getenv()</code></a> instead of using the environ array
from the C library directly. On Windows, the strings in the environ
array are in system codepage encoding, while in most of the typical
use cases for environment variables in GLib-using programs you want
the UTF-8 encoding that this function and <a class="link" href="glib-Miscellaneous-Utility-Functions.html#g-getenv" title="g_getenv ()"><code class="function">g_getenv()</code></a> provide.</p>
<div class="refsect3">
<a name="g-listenv.returns"></a><h4>Returns</h4>
<p> a <a class="link" href="glib-Standard-Macros.html#NULL:CAPS" title="NULL"><code class="literal">NULL</code></a>-terminated
list of strings which must be freed with <a class="link" href="glib-String-Utility-Functions.html#g-strfreev" title="g_strfreev ()"><code class="function">g_strfreev()</code></a>. </p>
<p><span class="annotation">[<acronym title="Parameter points to an array of items."><span class="acronym">array</span></acronym> zero-terminated=1][<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span></p>
</div>
<p class="since">Since: <a class="link" href="api-index-2-8.html#api-index-2.8">2.8</a></p>
</div>
<hr>
<div class="refsect2">
<a name="g-get-user-name"></a><h3>g_get_user_name ()</h3>
<pre class="programlisting">const <a class="link" href="glib-Basic-Types.html#gchar" title="gchar"><span class="returnvalue">gchar</span></a> *
g_get_user_name (<em class="parameter"><code><span class="type">void</span></code></em>);</pre>
<p>Gets the user name of the current user. The encoding of the returned
string is system-defined. On UNIX, it might be the preferred file name
encoding, or something else, and there is no guarantee that it is even
consistent on a machine. On Windows, it is always UTF-8.</p>
<div class="refsect3">
<a name="g-get-user-name.returns"></a><h4>Returns</h4>
<p> the user name of the current user.</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="g-get-real-name"></a><h3>g_get_real_name ()</h3>
<pre class="programlisting">const <a class="link" href="glib-Basic-Types.html#gchar" title="gchar"><span class="returnvalue">gchar</span></a> *
g_get_real_name (<em class="parameter"><code><span class="type">void</span></code></em>);</pre>
<p>Gets the real name of the user. This usually comes from the user's
entry in the <code class="literal">passwd</code> file. The encoding of the returned string is
system-defined. (On Windows, it is, however, always UTF-8.) If the
real user name cannot be determined, the string "Unknown" is 
returned.</p>
<div class="refsect3">
<a name="g-get-real-name.returns"></a><h4>Returns</h4>
<p> the user's real name.</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="g-get-user-cache-dir"></a><h3>g_get_user_cache_dir ()</h3>
<pre class="programlisting">const <a class="link" href="glib-Basic-Types.html#gchar" title="gchar"><span class="returnvalue">gchar</span></a> *
g_get_user_cache_dir (<em class="parameter"><code><span class="type">void</span></code></em>);</pre>
<p>Returns a base directory in which to store non-essential, cached
data specific to particular user.</p>
<p>On UNIX platforms this is determined using the mechanisms described
in the
<a class="ulink" href="http://www.freedesktop.org/Standards/basedir-spec" target="_top">XDG Base Directory Specification</a>.
In this case the directory retrieved will be XDG_CACHE_HOME.</p>
<p>On Windows is the directory that serves as a common repository for
temporary Internet files. A typical path is
C:\Documents and Settings\username\Local Settings\Temporary Internet Files.
See documentation for CSIDL_INTERNET_CACHE.</p>
<div class="refsect3">
<a name="g-get-user-cache-dir.returns"></a><h4>Returns</h4>
<p> a string owned by GLib that must not be modified
or freed.</p>
</div>
<p class="since">Since: <a class="link" href="api-index-2-6.html#api-index-2.6">2.6</a></p>
</div>
<hr>
<div class="refsect2">
<a name="g-get-user-data-dir"></a><h3>g_get_user_data_dir ()</h3>
<pre class="programlisting">const <a class="link" href="glib-Basic-Types.html#gchar" title="gchar"><span class="returnvalue">gchar</span></a> *
g_get_user_data_dir (<em class="parameter"><code><span class="type">void</span></code></em>);</pre>
<p>Returns a base directory in which to access application data such
as icons that is customized for a particular user.  </p>
<p>On UNIX platforms this is determined using the mechanisms described
in the
<a class="ulink" href="http://www.freedesktop.org/Standards/basedir-spec" target="_top">XDG Base Directory Specification</a>.
In this case the directory retrieved will be <code class="literal">XDG_DATA_HOME</code>.</p>
<p>On Windows this is the folder to use for local (as opposed to
roaming) application data. See documentation for
CSIDL_LOCAL_APPDATA. Note that on Windows it thus is the same as
what <a class="link" href="glib-Miscellaneous-Utility-Functions.html#g-get-user-config-dir" title="g_get_user_config_dir ()"><code class="function">g_get_user_config_dir()</code></a> returns.</p>
<div class="refsect3">
<a name="g-get-user-data-dir.returns"></a><h4>Returns</h4>
<p> a string owned by GLib that must not be modified
or freed.</p>
</div>
<p class="since">Since: <a class="link" href="api-index-2-6.html#api-index-2.6">2.6</a></p>
</div>
<hr>
<div class="refsect2">
<a name="g-get-user-config-dir"></a><h3>g_get_user_config_dir ()</h3>
<pre class="programlisting">const <a class="link" href="glib-Basic-Types.html#gchar" title="gchar"><span class="returnvalue">gchar</span></a> *
g_get_user_config_dir (<em class="parameter"><code><span class="type">void</span></code></em>);</pre>
<p>Returns a base directory in which to store user-specific application 
configuration information such as user preferences and settings. </p>
<p>On UNIX platforms this is determined using the mechanisms described
in the
<a class="ulink" href="http://www.freedesktop.org/Standards/basedir-spec" target="_top">XDG Base Directory Specification</a>.
In this case the directory retrieved will be <code class="literal">XDG_CONFIG_HOME</code>.</p>
<p>On Windows this is the folder to use for local (as opposed to
roaming) application data. See documentation for
CSIDL_LOCAL_APPDATA. Note that on Windows it thus is the same as
what <a class="link" href="glib-Miscellaneous-Utility-Functions.html#g-get-user-data-dir" title="g_get_user_data_dir ()"><code class="function">g_get_user_data_dir()</code></a> returns.</p>
<div class="refsect3">
<a name="g-get-user-config-dir.returns"></a><h4>Returns</h4>
<p> a string owned by GLib that must not be modified
or freed.</p>
</div>
<p class="since">Since: <a class="link" href="api-index-2-6.html#api-index-2.6">2.6</a></p>
</div>
<hr>
<div class="refsect2">
<a name="g-get-user-runtime-dir"></a><h3>g_get_user_runtime_dir ()</h3>
<pre class="programlisting">const <a class="link" href="glib-Basic-Types.html#gchar" title="gchar"><span class="returnvalue">gchar</span></a> *
g_get_user_runtime_dir (<em class="parameter"><code><span class="type">void</span></code></em>);</pre>
<p>Returns a directory that is unique to the current user on the local
system.</p>
<p>On UNIX platforms this is determined using the mechanisms described
in the 
<a class="ulink" href="http://www.freedesktop.org/Standards/basedir-spec" target="_top">XDG Base Directory Specification</a>.
This is the directory
specified in the <code class="literal">XDG_RUNTIME_DIR</code> environment variable.
In the case that this variable is not set, we return the value of
<a class="link" href="glib-Miscellaneous-Utility-Functions.html#g-get-user-cache-dir" title="g_get_user_cache_dir ()"><code class="function">g_get_user_cache_dir()</code></a>, after verifying that it exists.</p>
<p>On Windows this is the folder to use for local (as opposed to
roaming) application data. See documentation for
CSIDL_LOCAL_APPDATA.  Note that on Windows it thus is the same as
what <a class="link" href="glib-Miscellaneous-Utility-Functions.html#g-get-user-config-dir" title="g_get_user_config_dir ()"><code class="function">g_get_user_config_dir()</code></a> returns.</p>
<div class="refsect3">
<a name="g-get-user-runtime-dir.returns"></a><h4>Returns</h4>
<p> a string owned by GLib that must not be modified or freed.</p>
</div>
<p class="since">Since: <a class="link" href="api-index-2-28.html#api-index-2.28">2.28</a></p>
</div>
<hr>
<div class="refsect2">
<a name="g-get-user-special-dir"></a><h3>g_get_user_special_dir ()</h3>
<pre class="programlisting">const <a class="link" href="glib-Basic-Types.html#gchar" title="gchar"><span class="returnvalue">gchar</span></a> *
g_get_user_special_dir (<em class="parameter"><code><a class="link" href="glib-Miscellaneous-Utility-Functions.html#GUserDirectory" title="enum GUserDirectory"><span class="type">GUserDirectory</span></a> directory</code></em>);</pre>
<p>Returns the full path of a special directory using its logical id.</p>
<p>On UNIX this is done using the XDG special user directories.
For compatibility with existing practise, <a class="link" href="glib-Miscellaneous-Utility-Functions.html#G-USER-DIRECTORY-DESKTOP:CAPS"><code class="literal">G_USER_DIRECTORY_DESKTOP</code></a>
falls back to <code class="literal">$HOME/Desktop</code> when XDG special user directories have
not been set up. </p>
<p>Depending on the platform, the user might be able to change the path
of the special directory without requiring the session to restart; GLib
will not reflect any change once the special directories are loaded.</p>
<div class="refsect3">
<a name="g-get-user-special-dir.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>directory</p></td>
<td class="parameter_description"><p>the logical id of special directory</p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="g-get-user-special-dir.returns"></a><h4>Returns</h4>
<p> the path to the specified special directory, or <a class="link" href="glib-Standard-Macros.html#NULL:CAPS" title="NULL"><code class="literal">NULL</code></a>
if the logical id was not found. The returned string is owned by
GLib and should not be modified or freed.</p>
</div>
<p class="since">Since: <a class="link" href="api-index-2-14.html#api-index-2.14">2.14</a></p>
</div>
<hr>
<div class="refsect2">
<a name="g-get-system-data-dirs"></a><h3>g_get_system_data_dirs ()</h3>
<pre class="programlisting">const <a class="link" href="glib-Basic-Types.html#gchar" title="gchar"><span class="returnvalue">gchar</span></a> * const *
g_get_system_data_dirs (<em class="parameter"><code><span class="type">void</span></code></em>);</pre>
<p>Returns an ordered list of base directories in which to access 
system-wide application data.</p>
<p>On UNIX platforms this is determined using the mechanisms described
in the
<a class="ulink" href="http://www.freedesktop.org/Standards/basedir-spec" target="_top">XDG Base Directory Specification</a>
In this case the list of directories retrieved will be XDG_DATA_DIRS.</p>
<p>On Windows the first elements in the list are the Application Data
and Documents folders for All Users. (These can be determined only
on Windows 2000 or later and are not present in the list on other
Windows versions.) See documentation for CSIDL_COMMON_APPDATA and
CSIDL_COMMON_DOCUMENTS.</p>
<p>Then follows the "share" subfolder in the installation folder for
the package containing the DLL that calls this function, if it can
be determined.</p>
<p>Finally the list contains the "share" subfolder in the installation
folder for GLib, and in the installation folder for the package the
application's .exe file belongs to.</p>
<p>The installation folders above are determined by looking up the
folder where the module (DLL or EXE) in question is located. If the
folder's name is "bin", its parent is used, otherwise the folder
itself.</p>
<p>Note that on Windows the returned list can vary depending on where
this function is called.</p>
<div class="refsect3">
<a name="g-get-system-data-dirs.returns"></a><h4>Returns</h4>
<p> a <a class="link" href="glib-Standard-Macros.html#NULL:CAPS" title="NULL"><code class="literal">NULL</code></a>-terminated array of strings owned by GLib that must
not be modified or freed. </p>
<p><span class="annotation">[<acronym title="Parameter points to an array of items."><span class="acronym">array</span></acronym> zero-terminated=1][<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>]</span></p>
</div>
<p class="since">Since: <a class="link" href="api-index-2-6.html#api-index-2.6">2.6</a></p>
</div>
<hr>
<div class="refsect2">
<a name="g-get-system-config-dirs"></a><h3>g_get_system_config_dirs ()</h3>
<pre class="programlisting">const <a class="link" href="glib-Basic-Types.html#gchar" title="gchar"><span class="returnvalue">gchar</span></a> * const *
g_get_system_config_dirs (<em class="parameter"><code><span class="type">void</span></code></em>);</pre>
<p>Returns an ordered list of base directories in which to access 
system-wide configuration information.</p>
<p>On UNIX platforms this is determined using the mechanisms described
in the
<a class="ulink" href="http://www.freedesktop.org/Standards/basedir-spec" target="_top">XDG Base Directory Specification</a>.
In this case the list of directories retrieved will be <code class="literal">XDG_CONFIG_DIRS</code>.</p>
<p>On Windows is the directory that contains application data for all users.
A typical path is C:\Documents and Settings\All Users\Application Data.
This folder is used for application data that is not user specific.
For example, an application can store a spell-check dictionary, a database
of clip art, or a log file in the CSIDL_COMMON_APPDATA folder.
This information will not roam and is available to anyone using the computer.</p>
<div class="refsect3">
<a name="g-get-system-config-dirs.returns"></a><h4>Returns</h4>
<p> a <a class="link" href="glib-Standard-Macros.html#NULL:CAPS" title="NULL"><code class="literal">NULL</code></a>-terminated array of strings owned by GLib that must
not be modified or freed. </p>
<p><span class="annotation">[<acronym title="Parameter points to an array of items."><span class="acronym">array</span></acronym> zero-terminated=1][<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>]</span></p>
</div>
<p class="since">Since: <a class="link" href="api-index-2-6.html#api-index-2.6">2.6</a></p>
</div>
<hr>
<div class="refsect2">
<a name="g-reload-user-special-dirs-cache"></a><h3>g_reload_user_special_dirs_cache ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
g_reload_user_special_dirs_cache (<em class="parameter"><code><span class="type">void</span></code></em>);</pre>
<p>Resets the cache used for <a class="link" href="glib-Miscellaneous-Utility-Functions.html#g-get-user-special-dir" title="g_get_user_special_dir ()"><code class="function">g_get_user_special_dir()</code></a>, so
that the latest on-disk version is used. Call this only
if you just changed the data on disk yourself.</p>
<p>Due to threadsafety issues this may cause leaking of strings
that were previously returned from <a class="link" href="glib-Miscellaneous-Utility-Functions.html#g-get-user-special-dir" title="g_get_user_special_dir ()"><code class="function">g_get_user_special_dir()</code></a>
that can't be freed. We ensure to only leak the data for
the directories that actually changed value though.</p>
<p class="since">Since: <a class="link" href="api-index-2-22.html#api-index-2.22">2.22</a></p>
</div>
<hr>
<div class="refsect2">
<a name="g-get-host-name"></a><h3>g_get_host_name ()</h3>
<pre class="programlisting">const <a class="link" href="glib-Basic-Types.html#gchar" title="gchar"><span class="returnvalue">gchar</span></a> *
g_get_host_name (<em class="parameter"><code><span class="type">void</span></code></em>);</pre>
<p>Return a name for the machine. </p>
<p>The returned name is not necessarily a fully-qualified domain name,
or even present in DNS or some other name service at all. It need
not even be unique on your local network or site, but usually it
is. Callers should not rely on the return value having any specific
properties like uniqueness for security purposes. Even if the name
of the machine is changed while an application is running, the
return value from this function does not change. The returned
string is owned by GLib and should not be modified or freed. If no
name can be determined, a default fixed string "localhost" is
returned.</p>
<div class="refsect3">
<a name="g-get-host-name.returns"></a><h4>Returns</h4>
<p> the host name of the machine.</p>
</div>
<p class="since">Since: <a class="link" href="api-index-2-8.html#api-index-2.8">2.8</a></p>
</div>
<hr>
<div class="refsect2">
<a name="g-get-home-dir"></a><h3>g_get_home_dir ()</h3>
<pre class="programlisting">const <a class="link" href="glib-Basic-Types.html#gchar" title="gchar"><span class="returnvalue">gchar</span></a> *
g_get_home_dir (<em class="parameter"><code><span class="type">void</span></code></em>);</pre>
<p>Gets the current user's home directory.</p>
<p>As with most UNIX tools, this function will return the value of the
<code class="literal">HOME</code> environment variable if it is set to an existing absolute path
name, falling back to the <code class="literal">passwd</code> file in the case that it is unset.</p>
<p>If the path given in <code class="literal">HOME</code> is non-absolute, does not exist, or is
not a directory, the result is undefined.</p>
<p>Before version 2.36 this function would ignore the <code class="literal">HOME</code> environment
variable, taking the value from the <code class="literal">passwd</code> database instead. This was
changed to increase the compatibility of GLib with other programs (and
the XDG basedir specification) and to increase testability of programs
based on GLib (by making it easier to run them from test frameworks).</p>
<p>If your program has a strong requirement for either the new or the
old behaviour (and if you don't wish to increase your GLib
dependency to ensure that the new behaviour is in effect) then you
should either directly check the <code class="literal">HOME</code> environment variable yourself
or unset it before calling any functions in GLib.</p>
<div class="refsect3">
<a name="g-get-home-dir.returns"></a><h4>Returns</h4>
<p> the current user's home directory</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="g-get-tmp-dir"></a><h3>g_get_tmp_dir ()</h3>
<pre class="programlisting">const <a class="link" href="glib-Basic-Types.html#gchar" title="gchar"><span class="returnvalue">gchar</span></a> *
g_get_tmp_dir (<em class="parameter"><code><span class="type">void</span></code></em>);</pre>
<p>Gets the directory to use for temporary files.</p>
<p>On UNIX, this is taken from the <code class="literal">TMPDIR</code> environment variable.
If the variable is not set, <code class="literal">P_tmpdir</code> is
used, as defined by the system C library. Failing that, a
hard-coded default of "/tmp" is returned.</p>
<p>On Windows, the <code class="literal">TEMP</code> environment variable is used, with the
root directory of the Windows installation (eg: "C:\") used
as a default.</p>
<p>The encoding of the returned string is system-defined. On Windows,
it is always UTF-8. The return value is never <a class="link" href="glib-Standard-Macros.html#NULL:CAPS" title="NULL"><code class="literal">NULL</code></a> or the empty
string.</p>
<div class="refsect3">
<a name="g-get-tmp-dir.returns"></a><h4>Returns</h4>
<p> the directory to use for temporary files.</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="g-get-current-dir"></a><h3>g_get_current_dir ()</h3>
<pre class="programlisting"><a class="link" href="glib-Basic-Types.html#gchar" title="gchar"><span class="returnvalue">gchar</span></a> *
g_get_current_dir (<em class="parameter"><code><span class="type">void</span></code></em>);</pre>
<p>Gets the current directory.</p>
<p>The returned string should be freed when no longer needed.
The encoding of the returned string is system defined.
On Windows, it is always UTF-8.</p>
<p>Since GLib 2.40, this function will return the value of the "PWD"
environment variable if it is set and it happens to be the same as
the current directory.  This can make a difference in the case that
the current directory is the target of a symbolic link.</p>
<div class="refsect3">
<a name="g-get-current-dir.returns"></a><h4>Returns</h4>
<p> the current directory</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="g-basename"></a><h3>g_basename ()</h3>
<pre class="programlisting">const <a class="link" href="glib-Basic-Types.html#gchar" title="gchar"><span class="returnvalue">gchar</span></a> *
g_basename (<em class="parameter"><code>const <a class="link" href="glib-Basic-Types.html#gchar" title="gchar"><span class="type">gchar</span></a> *file_name</code></em>);</pre>
<div class="warning">
<p><code class="literal">g_basename</code> has been deprecated since version 2.2 and should not be used in newly-written code.</p>
<p>Use <a class="link" href="glib-Miscellaneous-Utility-Functions.html#g-path-get-basename" title="g_path_get_basename ()"><code class="function">g_path_get_basename()</code></a> instead, but notice
    that <a class="link" href="glib-Miscellaneous-Utility-Functions.html#g-path-get-basename" title="g_path_get_basename ()"><code class="function">g_path_get_basename()</code></a> allocates new memory for the
    returned string, unlike this function which returns a pointer
    into the argument.</p>
</div>
<p>Gets the name of the file without any leading directory
components. It returns a pointer into the given file name
string.</p>
<div class="refsect3">
<a name="g-basename.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>file_name</p></td>
<td class="parameter_description"><p>the name of the file</p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="g-basename.returns"></a><h4>Returns</h4>
<p> the name of the file without any leading
directory components</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="g-path-is-absolute"></a><h3>g_path_is_absolute ()</h3>
<pre class="programlisting"><a class="link" href="glib-Basic-Types.html#gboolean" title="gboolean"><span class="returnvalue">gboolean</span></a>
g_path_is_absolute (<em class="parameter"><code>const <a class="link" href="glib-Basic-Types.html#gchar" title="gchar"><span class="type">gchar</span></a> *file_name</code></em>);</pre>
<p>Returns <a class="link" href="glib-Standard-Macros.html#TRUE:CAPS" title="TRUE"><code class="literal">TRUE</code></a> if the given <em class="parameter"><code>file_name</code></em>
 is an absolute file name.
Note that this is a somewhat vague concept on Windows.</p>
<p>On POSIX systems, an absolute file name is well-defined. It always
starts from the single root directory. For example "/usr/local".</p>
<p>On Windows, the concepts of current drive and drive-specific
current directory introduce vagueness. This function interprets as
an absolute file name one that either begins with a directory
separator such as "\Users\tml" or begins with the root on a drive,
for example "C:\Windows". The first case also includes UNC paths
such as "\myserver\docs\foo". In all cases, either slashes or
backslashes are accepted.</p>
<p>Note that a file name relative to the current drive root does not
truly specify a file uniquely over time and across processes, as
the current drive is a per-process value and can be changed.</p>
<p>File names relative the current directory on some specific drive,
such as "D:foo/bar", are not interpreted as absolute by this
function, but they obviously are not relative to the normal current
directory as returned by <code class="function">getcwd()</code> or <a class="link" href="glib-Miscellaneous-Utility-Functions.html#g-get-current-dir" title="g_get_current_dir ()"><code class="function">g_get_current_dir()</code></a>
either. Such paths should be avoided, or need to be handled using
Windows-specific code.</p>
<div class="refsect3">
<a name="g-path-is-absolute.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>file_name</p></td>
<td class="parameter_description"><p>a file name</p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="g-path-is-absolute.returns"></a><h4>Returns</h4>
<p> <a class="link" href="glib-Standard-Macros.html#TRUE:CAPS" title="TRUE"><code class="literal">TRUE</code></a> if <em class="parameter"><code>file_name</code></em>
is absolute</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="g-path-skip-root"></a><h3>g_path_skip_root ()</h3>
<pre class="programlisting">const <a class="link" href="glib-Basic-Types.html#gchar" title="gchar"><span class="returnvalue">gchar</span></a> *
g_path_skip_root (<em class="parameter"><code>const <a class="link" href="glib-Basic-Types.html#gchar" title="gchar"><span class="type">gchar</span></a> *file_name</code></em>);</pre>
<p>Returns a pointer into <em class="parameter"><code>file_name</code></em>
 after the root component,
i.e. after the "/" in UNIX or "C:\" under Windows. If <em class="parameter"><code>file_name</code></em>

is not an absolute path it returns <a class="link" href="glib-Standard-Macros.html#NULL:CAPS" title="NULL"><code class="literal">NULL</code></a>.</p>
<div class="refsect3">
<a name="g-path-skip-root.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>file_name</p></td>
<td class="parameter_description"><p>a file name</p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="g-path-skip-root.returns"></a><h4>Returns</h4>
<p> a pointer into <em class="parameter"><code>file_name</code></em>
after the root component. </p>
<p><span class="annotation">[<acronym title="NULL may be passed as the value in, out, in-out; or as a return value."><span class="acronym">nullable</span></acronym>]</span></p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="g-path-get-basename"></a><h3>g_path_get_basename ()</h3>
<pre class="programlisting"><a class="link" href="glib-Basic-Types.html#gchar" title="gchar"><span class="returnvalue">gchar</span></a> *
g_path_get_basename (<em class="parameter"><code>const <a class="link" href="glib-Basic-Types.html#gchar" title="gchar"><span class="type">gchar</span></a> *file_name</code></em>);</pre>
<p>Gets the last component of the filename.</p>
<p>If <em class="parameter"><code>file_name</code></em>
 ends with a directory separator it gets the component
before the last slash. If <em class="parameter"><code>file_name</code></em>
 consists only of directory
separators (and on Windows, possibly a drive letter), a single
separator is returned. If <em class="parameter"><code>file_name</code></em>
 is empty, it gets ".".</p>
<div class="refsect3">
<a name="g-path-get-basename.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>file_name</p></td>
<td class="parameter_description"><p>the name of the file</p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="g-path-get-basename.returns"></a><h4>Returns</h4>
<p> a newly allocated string containing the last
component of the filename</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="g-path-get-dirname"></a><h3>g_path_get_dirname ()</h3>
<pre class="programlisting"><a class="link" href="glib-Basic-Types.html#gchar" title="gchar"><span class="returnvalue">gchar</span></a> *
g_path_get_dirname (<em class="parameter"><code>const <a class="link" href="glib-Basic-Types.html#gchar" title="gchar"><span class="type">gchar</span></a> *file_name</code></em>);</pre>
<p>Gets the directory components of a file name.</p>
<p>If the file name has no directory components "." is returned.
The returned string should be freed when no longer needed.</p>
<div class="refsect3">
<a name="g-path-get-dirname.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>file_name</p></td>
<td class="parameter_description"><p>the name of the file</p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="g-path-get-dirname.returns"></a><h4>Returns</h4>
<p> the directory components of the file</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="g-build-filename"></a><h3>g_build_filename ()</h3>
<pre class="programlisting"><a class="link" href="glib-Basic-Types.html#gchar" title="gchar"><span class="returnvalue">gchar</span></a> *
g_build_filename (<em class="parameter"><code>const <a class="link" href="glib-Basic-Types.html#gchar" title="gchar"><span class="type">gchar</span></a> *first_element</code></em>,
                  <em class="parameter"><code>...</code></em>);</pre>
<p>Creates a filename from a series of elements using the correct
separator for filenames.</p>
<p>On Unix, this function behaves identically to <code class="literal">g_build_path
(G_DIR_SEPARATOR_S, first_element, ....)</code>.</p>
<p>On Windows, it takes into account that either the backslash
(<code class="literal">\</code> or slash (<code class="literal">/</code>) can be used as separator in filenames, but
otherwise behaves as on UNIX. When file pathname separators need
to be inserted, the one that last previously occurred in the
parameters (reading from left to right) is used.</p>
<p>No attempt is made to force the resulting filename to be an absolute
path. If the first element is a relative path, the result will
be a relative path.</p>
<div class="refsect3">
<a name="g-build-filename.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>first_element</p></td>
<td class="parameter_description"><p>the first element in the path</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>...</p></td>
<td class="parameter_description"><p>remaining elements in path, terminated by <a class="link" href="glib-Standard-Macros.html#NULL:CAPS" title="NULL"><code class="literal">NULL</code></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="g-build-filename.returns"></a><h4>Returns</h4>
<p> a newly-allocated string that must be freed with <a class="link" href="glib-Memory-Allocation.html#g-free" title="g_free ()"><code class="function">g_free()</code></a>.</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="g-build-filenamev"></a><h3>g_build_filenamev ()</h3>
<pre class="programlisting"><a class="link" href="glib-Basic-Types.html#gchar" title="gchar"><span class="returnvalue">gchar</span></a> *
g_build_filenamev (<em class="parameter"><code><a class="link" href="glib-Basic-Types.html#gchar" title="gchar"><span class="type">gchar</span></a> **args</code></em>);</pre>
<p>Behaves exactly like <a class="link" href="glib-Miscellaneous-Utility-Functions.html#g-build-filename" title="g_build_filename ()"><code class="function">g_build_filename()</code></a>, but takes the path elements 
as a string array, instead of varargs. This function is mainly
meant for language bindings.</p>
<div class="refsect3">
<a name="g-build-filenamev.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>args</p></td>
<td class="parameter_description"><p> <a class="link" href="glib-Standard-Macros.html#NULL:CAPS" title="NULL"><code class="literal">NULL</code></a>-terminated array of strings containing the path elements. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter points to an array of items."><span class="acronym">array</span></acronym> zero-terminated=1]</span></td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="g-build-filenamev.returns"></a><h4>Returns</h4>
<p> a newly-allocated string that must be freed with <a class="link" href="glib-Memory-Allocation.html#g-free" title="g_free ()"><code class="function">g_free()</code></a>.</p>
</div>
<p class="since">Since: <a class="link" href="api-index-2-8.html#api-index-2.8">2.8</a></p>
</div>
<hr>
<div class="refsect2">
<a name="g-build-path"></a><h3>g_build_path ()</h3>
<pre class="programlisting"><a class="link" href="glib-Basic-Types.html#gchar" title="gchar"><span class="returnvalue">gchar</span></a> *
g_build_path (<em class="parameter"><code>const <a class="link" href="glib-Basic-Types.html#gchar" title="gchar"><span class="type">gchar</span></a> *separator</code></em>,
              <em class="parameter"><code>const <a class="link" href="glib-Basic-Types.html#gchar" title="gchar"><span class="type">gchar</span></a> *first_element</code></em>,
              <em class="parameter"><code>...</code></em>);</pre>
<p>Creates a path from a series of elements using <em class="parameter"><code>separator</code></em>
 as the
separator between elements. At the boundary between two elements,
any trailing occurrences of separator in the first element, or
leading occurrences of separator in the second element are removed
and exactly one copy of the separator is inserted.</p>
<p>Empty elements are ignored.</p>
<p>The number of leading copies of the separator on the result is
the same as the number of leading copies of the separator on
the first non-empty element.</p>
<p>The number of trailing copies of the separator on the result is
the same as the number of trailing copies of the separator on
the last non-empty element. (Determination of the number of
trailing copies is done without stripping leading copies, so
if the separator is <code class="literal">ABA</code>, then <code class="literal">ABABA</code> has 1 trailing copy.)</p>
<p>However, if there is only a single non-empty element, and there
are no characters in that element not part of the leading or
trailing separators, then the result is exactly the original value
of that element.</p>
<p>Other than for determination of the number of leading and trailing
copies of the separator, elements consisting only of copies
of the separator are ignored.</p>
<div class="refsect3">
<a name="g-build-path.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>separator</p></td>
<td class="parameter_description"><p>a string used to separator the elements of the path.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>first_element</p></td>
<td class="parameter_description"><p>the first element in the path</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>...</p></td>
<td class="parameter_description"><p>remaining elements in path, terminated by <a class="link" href="glib-Standard-Macros.html#NULL:CAPS" title="NULL"><code class="literal">NULL</code></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="g-build-path.returns"></a><h4>Returns</h4>
<p> a newly-allocated string that must be freed with <a class="link" href="glib-Memory-Allocation.html#g-free" title="g_free ()"><code class="function">g_free()</code></a>.</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="g-build-pathv"></a><h3>g_build_pathv ()</h3>
<pre class="programlisting"><a class="link" href="glib-Basic-Types.html#gchar" title="gchar"><span class="returnvalue">gchar</span></a> *
g_build_pathv (<em class="parameter"><code>const <a class="link" href="glib-Basic-Types.html#gchar" title="gchar"><span class="type">gchar</span></a> *separator</code></em>,
               <em class="parameter"><code><a class="link" href="glib-Basic-Types.html#gchar" title="gchar"><span class="type">gchar</span></a> **args</code></em>);</pre>
<p>Behaves exactly like <a class="link" href="glib-Miscellaneous-Utility-Functions.html#g-build-path" title="g_build_path ()"><code class="function">g_build_path()</code></a>, but takes the path elements 
as a string array, instead of varargs. This function is mainly
meant for language bindings.</p>
<div class="refsect3">
<a name="g-build-pathv.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>separator</p></td>
<td class="parameter_description"><p>a string used to separator the elements of the path.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>args</p></td>
<td class="parameter_description"><p> <a class="link" href="glib-Standard-Macros.html#NULL:CAPS" title="NULL"><code class="literal">NULL</code></a>-terminated array of strings containing the path elements. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter points to an array of items."><span class="acronym">array</span></acronym> zero-terminated=1]</span></td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="g-build-pathv.returns"></a><h4>Returns</h4>
<p> a newly-allocated string that must be freed with <a class="link" href="glib-Memory-Allocation.html#g-free" title="g_free ()"><code class="function">g_free()</code></a>.</p>
</div>
<p class="since">Since: <a class="link" href="api-index-2-8.html#api-index-2.8">2.8</a></p>
</div>
<hr>
<div class="refsect2">
<a name="g-format-size"></a><h3>g_format_size ()</h3>
<pre class="programlisting"><a class="link" href="glib-Basic-Types.html#gchar" title="gchar"><span class="returnvalue">gchar</span></a> *
g_format_size (<em class="parameter"><code><a class="link" href="glib-Basic-Types.html#guint64" title="guint64"><span class="type">guint64</span></a> size</code></em>);</pre>
<p>Formats a size (for example the size of a file) into a human readable
string.  Sizes are rounded to the nearest size prefix (kB, MB, GB)
and are displayed rounded to the nearest tenth. E.g. the file size
3292528 bytes will be converted into the string "3.2 MB".</p>
<p>The prefix units base is 1000 (i.e. 1 kB is 1000 bytes).</p>
<p>This string should be freed with <a class="link" href="glib-Memory-Allocation.html#g-free" title="g_free ()"><code class="function">g_free()</code></a> when not needed any longer.</p>
<p>See <a class="link" href="glib-Miscellaneous-Utility-Functions.html#g-format-size-full" title="g_format_size_full ()"><code class="function">g_format_size_full()</code></a> for more options about how the size might be
formatted.</p>
<div class="refsect3">
<a name="g-format-size.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>size</p></td>
<td class="parameter_description"><p>a size in bytes</p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="g-format-size.returns"></a><h4>Returns</h4>
<p> a newly-allocated formatted string containing a human readable
file size</p>
</div>
<p class="since">Since: <a class="link" href="api-index-2-30.html#api-index-2.30">2.30</a></p>
</div>
<hr>
<div class="refsect2">
<a name="g-format-size-full"></a><h3>g_format_size_full ()</h3>
<pre class="programlisting"><a class="link" href="glib-Basic-Types.html#gchar" title="gchar"><span class="returnvalue">gchar</span></a> *
g_format_size_full (<em class="parameter"><code><a class="link" href="glib-Basic-Types.html#guint64" title="guint64"><span class="type">guint64</span></a> size</code></em>,
                    <em class="parameter"><code><a class="link" href="glib-Miscellaneous-Utility-Functions.html#GFormatSizeFlags" title="enum GFormatSizeFlags"><span class="type">GFormatSizeFlags</span></a> flags</code></em>);</pre>
<p>Formats a size.</p>
<p>This function is similar to <a class="link" href="glib-Miscellaneous-Utility-Functions.html#g-format-size" title="g_format_size ()"><code class="function">g_format_size()</code></a> but allows for flags
that modify the output. See <a class="link" href="glib-Miscellaneous-Utility-Functions.html#GFormatSizeFlags" title="enum GFormatSizeFlags"><span class="type">GFormatSizeFlags</span></a>.</p>
<div class="refsect3">
<a name="g-format-size-full.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>size</p></td>
<td class="parameter_description"><p>a size in bytes</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>flags</p></td>
<td class="parameter_description"><p><a class="link" href="glib-Miscellaneous-Utility-Functions.html#GFormatSizeFlags" title="enum GFormatSizeFlags"><span class="type">GFormatSizeFlags</span></a> to modify the output</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="g-format-size-full.returns"></a><h4>Returns</h4>
<p> a newly-allocated formatted string containing a human
readable file size</p>
</div>
<p class="since">Since: <a class="link" href="api-index-2-30.html#api-index-2.30">2.30</a></p>
</div>
<hr>
<div class="refsect2">
<a name="g-format-size-for-display"></a><h3>g_format_size_for_display ()</h3>
<pre class="programlisting"><a class="link" href="glib-Basic-Types.html#gchar" title="gchar"><span class="returnvalue">gchar</span></a> *
g_format_size_for_display (<em class="parameter"><code><a class="link" href="glib-Basic-Types.html#goffset" title="goffset"><span class="type">goffset</span></a> size</code></em>);</pre>
<div class="warning">
<p><code class="literal">g_format_size_for_display</code> has been deprecated since version 2.30 and should not be used in newly-written code.</p>
<p>This function is broken due to its use of SI
    suffixes to denote IEC units. Use <a class="link" href="glib-Miscellaneous-Utility-Functions.html#g-format-size" title="g_format_size ()"><code class="function">g_format_size()</code></a> instead.</p>
</div>
<p>Formats a size (for example the size of a file) into a human
readable string. Sizes are rounded to the nearest size prefix
(KB, MB, GB) and are displayed rounded to the nearest tenth.
E.g. the file size 3292528 bytes will be converted into the
string "3.1 MB".</p>
<p>The prefix units base is 1024 (i.e. 1 KB is 1024 bytes).</p>
<p>This string should be freed with <a class="link" href="glib-Memory-Allocation.html#g-free" title="g_free ()"><code class="function">g_free()</code></a> when not needed any longer.</p>
<div class="refsect3">
<a name="g-format-size-for-display.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>size</p></td>
<td class="parameter_description"><p>a size in bytes</p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="g-format-size-for-display.returns"></a><h4>Returns</h4>
<p> a newly-allocated formatted string containing a human
readable file size</p>
</div>
<p class="since">Since: <a class="link" href="api-index-2-16.html#api-index-2.16">2.16</a></p>
</div>
<hr>
<div class="refsect2">
<a name="g-find-program-in-path"></a><h3>g_find_program_in_path ()</h3>
<pre class="programlisting"><a class="link" href="glib-Basic-Types.html#gchar" title="gchar"><span class="returnvalue">gchar</span></a> *
g_find_program_in_path (<em class="parameter"><code>const <a class="link" href="glib-Basic-Types.html#gchar" title="gchar"><span class="type">gchar</span></a> *program</code></em>);</pre>
<p>Locates the first executable named <em class="parameter"><code>program</code></em>
 in the user's path, in the
same way that <code class="function">execvp()</code> would locate it. Returns an allocated string
with the absolute path name, or <a class="link" href="glib-Standard-Macros.html#NULL:CAPS" title="NULL"><code class="literal">NULL</code></a> if the program is not found in
the path. If <em class="parameter"><code>program</code></em>
 is already an absolute path, returns a copy of
<em class="parameter"><code>program</code></em>
 if <em class="parameter"><code>program</code></em>
 exists and is executable, and <a class="link" href="glib-Standard-Macros.html#NULL:CAPS" title="NULL"><code class="literal">NULL</code></a> otherwise.</p>
<p>On Windows, if <em class="parameter"><code>program</code></em>
 does not have a file type suffix, tries
with the suffixes .exe, .cmd, .bat and .com, and the suffixes in
the <code class="literal">PATHEXT</code> environment variable. </p>
<p>On Windows, it looks for the file in the same way as <code class="function">CreateProcess()</code> 
would. This means first in the directory where the executing
program was loaded from, then in the current directory, then in the
Windows 32-bit system directory, then in the Windows directory, and
finally in the directories in the <code class="literal">PATH</code> environment variable. If
the program is found, the return value contains the full name
including the type suffix.</p>
<div class="refsect3">
<a name="g-find-program-in-path.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>program</p></td>
<td class="parameter_description"><p>a program name in the GLib file name encoding</p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="g-find-program-in-path.returns"></a><h4>Returns</h4>
<p> a newly-allocated string with the absolute path, or <a class="link" href="glib-Standard-Macros.html#NULL:CAPS" title="NULL"><code class="literal">NULL</code></a></p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="g-bit-nth-lsf"></a><h3>g_bit_nth_lsf()</h3>
<pre class="programlisting">#define             g_bit_nth_lsf(mask, nth_bit)</pre>
<p>Find the position of the first bit set in <em class="parameter"><code>mask</code></em>
, searching
from (but not including) <em class="parameter"><code>nth_bit</code></em>
 upwards. Bits are numbered
from 0 (least significant) to sizeof(<a class="link" href="glib-Basic-Types.html#gulong" title="gulong"><span class="type">gulong</span></a>) * 8 - 1 (31 or 63,
usually). To start searching from the 0th bit, set <em class="parameter"><code>nth_bit</code></em>
 to -1.</p>
<div class="refsect3">
<a name="g-bit-nth-lsf.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>mask</p></td>
<td class="parameter_description"><p>a <a class="link" href="glib-Basic-Types.html#gulong" title="gulong"><span class="type">gulong</span></a> containing flags</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>nth_bit</p></td>
<td class="parameter_description"><p>the index of the bit to start the search from</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="g-bit-nth-lsf.returns"></a><h4>Returns</h4>
<p> the index of the first bit set which is higher than <em class="parameter"><code>nth_bit</code></em>
, or -1
if no higher bits are set</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="g-bit-nth-msf"></a><h3>g_bit_nth_msf()</h3>
<pre class="programlisting">#define             g_bit_nth_msf(mask, nth_bit)</pre>
<p>Find the position of the first bit set in <em class="parameter"><code>mask</code></em>
, searching
from (but not including) <em class="parameter"><code>nth_bit</code></em>
 downwards. Bits are numbered
from 0 (least significant) to sizeof(<a class="link" href="glib-Basic-Types.html#gulong" title="gulong"><span class="type">gulong</span></a>) * 8 - 1 (31 or 63,
usually). To start searching from the last bit, set <em class="parameter"><code>nth_bit</code></em>
 to
-1 or GLIB_SIZEOF_LONG * 8.</p>
<div class="refsect3">
<a name="g-bit-nth-msf.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>mask</p></td>
<td class="parameter_description"><p>a <a class="link" href="glib-Basic-Types.html#gulong" title="gulong"><span class="type">gulong</span></a> containing flags</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>nth_bit</p></td>
<td class="parameter_description"><p>the index of the bit to start the search from</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="g-bit-nth-msf.returns"></a><h4>Returns</h4>
<p> the index of the first bit set which is lower than <em class="parameter"><code>nth_bit</code></em>
, or -1
if no lower bits are set</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="g-bit-storage"></a><h3>g_bit_storage()</h3>
<pre class="programlisting">#define             g_bit_storage(number)</pre>
<p>Gets the number of bits used to hold <em class="parameter"><code>number</code></em>
,
e.g. if <em class="parameter"><code>number</code></em>
 is 4, 3 bits are needed.</p>
<div class="refsect3">
<a name="g-bit-storage.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>number</p></td>
<td class="parameter_description"><p>a <a class="link" href="glib-Basic-Types.html#guint" title="guint ()"><span class="type">guint</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="g-bit-storage.returns"></a><h4>Returns</h4>
<p> the number of bits used to hold <em class="parameter"><code>number</code></em>
</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="g-spaced-primes-closest"></a><h3>g_spaced_primes_closest ()</h3>
<pre class="programlisting"><a class="link" href="glib-Basic-Types.html#guint" title="guint ()"><span class="returnvalue">guint</span></a>
g_spaced_primes_closest (<em class="parameter"><code><a class="link" href="glib-Basic-Types.html#guint" title="guint ()"><span class="type">guint</span></a> num</code></em>);</pre>
<p>Gets the smallest prime number from a built-in array of primes which
is larger than <em class="parameter"><code>num</code></em>
. This is used within GLib to calculate the optimum
size of a <a class="link" href="glib-Hash-Tables.html#GHashTable" title="GHashTable"><span class="type">GHashTable</span></a>.</p>
<p>The built-in array of primes ranges from 11 to 13845163 such that
each prime is approximately 1.5-2 times the previous prime.</p>
<div class="refsect3">
<a name="g-spaced-primes-closest.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>num</p></td>
<td class="parameter_description"><p>a <a class="link" href="glib-Basic-Types.html#guint" title="guint ()"><span class="type">guint</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="g-spaced-primes-closest.returns"></a><h4>Returns</h4>
<p> the smallest prime number from a built-in array of primes
which is larger than <em class="parameter"><code>num</code></em>
</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="g-atexit"></a><h3>g_atexit ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
g_atexit (<em class="parameter"><code><a class="link" href="glib-Miscellaneous-Utility-Functions.html#GVoidFunc" title="GVoidFunc ()"><span class="type">GVoidFunc</span></a> func</code></em>);</pre>
<div class="warning">
<p><code class="literal">g_atexit</code> has been deprecated since version 2.32 and should not be used in newly-written code.</p>
<p>It is best to avoid <a class="link" href="glib-Miscellaneous-Utility-Functions.html#g-atexit" title="g_atexit ()"><code class="function">g_atexit()</code></a>.</p>
</div>
<p>Specifies a function to be called at normal program termination.</p>
<p>Since GLib 2.8.2, on Windows <a class="link" href="glib-Miscellaneous-Utility-Functions.html#g-atexit" title="g_atexit ()"><code class="function">g_atexit()</code></a> actually is a preprocessor
macro that maps to a call to the <code class="function">atexit()</code> function in the C
library. This means that in case the code that calls <a class="link" href="glib-Miscellaneous-Utility-Functions.html#g-atexit" title="g_atexit ()"><code class="function">g_atexit()</code></a>,
i.e. <code class="function">atexit()</code>, is in a DLL, the function will be called when the
DLL is detached from the program. This typically makes more sense
than that the function is called when the GLib DLL is detached,
which happened earlier when <a class="link" href="glib-Miscellaneous-Utility-Functions.html#g-atexit" title="g_atexit ()"><code class="function">g_atexit()</code></a> was a function in the GLib
DLL.</p>
<p>The behaviour of <code class="function">atexit()</code> in the context of dynamically loaded
modules is not formally specified and varies wildly.</p>
<p>On POSIX systems, calling <a class="link" href="glib-Miscellaneous-Utility-Functions.html#g-atexit" title="g_atexit ()"><code class="function">g_atexit()</code></a> (or <code class="function">atexit()</code>) in a dynamically
loaded module which is unloaded before the program terminates might
well cause a crash at program exit.</p>
<p>Some POSIX systems implement <code class="function">atexit()</code> like Windows, and have each
dynamically loaded module maintain an own atexit chain that is
called when the module is unloaded.</p>
<p>On other POSIX systems, before a dynamically loaded module is
unloaded, the registered atexit functions (if any) residing in that
module are called, regardless where the code that registered them
resided. This is presumably the most robust approach.</p>
<p>As can be seen from the above, for portability it's best to avoid
calling <a class="link" href="glib-Miscellaneous-Utility-Functions.html#g-atexit" title="g_atexit ()"><code class="function">g_atexit()</code></a> (or <code class="function">atexit()</code>) except in the main executable of a
program.</p>
<div class="refsect3">
<a name="g-atexit.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>func</p></td>
<td class="parameter_description"><p> the function to call on normal program termination. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="The callback is valid until first called."><span class="acronym">scope async</span></acronym>]</span></td>
</tr></tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="g-parse-debug-string"></a><h3>g_parse_debug_string ()</h3>
<pre class="programlisting"><a class="link" href="glib-Basic-Types.html#guint" title="guint ()"><span class="returnvalue">guint</span></a>
g_parse_debug_string (<em class="parameter"><code>const <a class="link" href="glib-Basic-Types.html#gchar" title="gchar"><span class="type">gchar</span></a> *string</code></em>,
                      <em class="parameter"><code>const <a class="link" href="glib-Miscellaneous-Utility-Functions.html#GDebugKey" title="struct GDebugKey"><span class="type">GDebugKey</span></a> *keys</code></em>,
                      <em class="parameter"><code><a class="link" href="glib-Basic-Types.html#guint" title="guint ()"><span class="type">guint</span></a> nkeys</code></em>);</pre>
<p>Parses a string containing debugging options
into a <a class="link" href="glib-Basic-Types.html#guint" title="guint ()"><code class="literal">guint</code></a> containing bit flags. This is used
within GDK and GTK+ to parse the debug options passed on the
command line or through environment variables.</p>
<p>If <em class="parameter"><code>string</code></em>
 is equal to "all", all flags are set. Any flags
specified along with "all" in <em class="parameter"><code>string</code></em>
 are inverted; thus,
"all,foo,bar" or "foo,bar,all" sets all flags except those
corresponding to "foo" and "bar".</p>
<p>If <em class="parameter"><code>string</code></em>
 is equal to "help", all the available keys in <em class="parameter"><code>keys</code></em>

are printed out to standard error.</p>
<div class="refsect3">
<a name="g-parse-debug-string.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>string</p></td>
<td class="parameter_description"><p> a list of debug options separated by colons, spaces, or
commas, or <a class="link" href="glib-Standard-Macros.html#NULL:CAPS" title="NULL"><code class="literal">NULL</code></a>. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>keys</p></td>
<td class="parameter_description"><p> pointer to an array of <a class="link" href="glib-Miscellaneous-Utility-Functions.html#GDebugKey" title="struct GDebugKey"><span class="type">GDebugKey</span></a> which associate
strings with bit flags. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter points to an array of items."><span class="acronym">array</span></acronym> length=nkeys]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>nkeys</p></td>
<td class="parameter_description"><p>the number of <a href="glib-Miscellaneous-Utility-Functions.html#GDebugKey"><span class="type">GDebugKeys</span></a> in the array.</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="g-parse-debug-string.returns"></a><h4>Returns</h4>
<p> the combined set of bit flags.</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="GVoidFunc"></a><h3>GVoidFunc ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
<span class="c_punctuation">(</span>*GVoidFunc<span class="c_punctuation">)</span> (<em class="parameter"><code><span class="type">void</span></code></em>);</pre>
<div class="warning"><p><code class="literal">GVoidFunc</code> is deprecated and should not be used in newly-written code.</p></div>
<p>Declares a type of function which takes no arguments
and has no return value. It is used to specify the type
function passed to <a class="link" href="glib-Miscellaneous-Utility-Functions.html#g-atexit" title="g_atexit ()"><code class="function">g_atexit()</code></a>.</p>
</div>
<hr>
<div class="refsect2">
<a name="GFreeFunc"></a><h3>GFreeFunc ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
<span class="c_punctuation">(</span>*GFreeFunc<span class="c_punctuation">)</span> (<em class="parameter"><code><a class="link" href="glib-Basic-Types.html#gpointer" title="gpointer"><span class="type">gpointer</span></a> data</code></em>);</pre>
<p>Declares a type of function which takes an arbitrary
data pointer argument and has no return value. It is
not currently used in GLib or GTK+.</p>
<div class="refsect3">
<a name="GFreeFunc.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>data</p></td>
<td class="parameter_description"><p>a data pointer</p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="g-qsort-with-data"></a><h3>g_qsort_with_data ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
g_qsort_with_data (<em class="parameter"><code><a class="link" href="glib-Basic-Types.html#gconstpointer" title="gconstpointer"><span class="type">gconstpointer</span></a> pbase</code></em>,
                   <em class="parameter"><code><a class="link" href="glib-Basic-Types.html#gint" title="gint ()"><span class="type">gint</span></a> total_elems</code></em>,
                   <em class="parameter"><code><a class="link" href="glib-Basic-Types.html#gsize" title="gsize"><span class="type">gsize</span></a> size</code></em>,
                   <em class="parameter"><code><a class="link" href="glib-Doubly-Linked-Lists.html#GCompareDataFunc" title="GCompareDataFunc ()"><span class="type">GCompareDataFunc</span></a> compare_func</code></em>,
                   <em class="parameter"><code><a class="link" href="glib-Basic-Types.html#gpointer" title="gpointer"><span class="type">gpointer</span></a> user_data</code></em>);</pre>
<p>This is just like the standard C <code class="function">qsort()</code> function, but
the comparison routine accepts a user data argument.</p>
<p>This is guaranteed to be a stable sort since version 2.32.</p>
<div class="refsect3">
<a name="g-qsort-with-data.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>pbase</p></td>
<td class="parameter_description"><p> start of array to sort. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="NULL must not be passed as the value in, out, in-out; or as a return value."><span class="acronym">not nullable</span></acronym>]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>total_elems</p></td>
<td class="parameter_description"><p>elements in the array</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>size</p></td>
<td class="parameter_description"><p>size of each element</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>compare_func</p></td>
<td class="parameter_description"><p>function to compare elements</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>user_data</p></td>
<td class="parameter_description"><p>data to pass to <em class="parameter"><code>compare_func</code></em>
</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="g-nullify-pointer"></a><h3>g_nullify_pointer ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
g_nullify_pointer (<em class="parameter"><code><a class="link" href="glib-Basic-Types.html#gpointer" title="gpointer"><span class="type">gpointer</span></a> *nullify_location</code></em>);</pre>
<p>Set the pointer at the specified location to <a class="link" href="glib-Standard-Macros.html#NULL:CAPS" title="NULL"><code class="literal">NULL</code></a>.</p>
<div class="refsect3">
<a name="g-nullify-pointer.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>nullify_location</p></td>
<td class="parameter_description"><p> the memory address of the pointer. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="NULL must not be passed as the value in, out, in-out; or as a return value."><span class="acronym">not nullable</span></acronym>]</span></td>
</tr></tbody>
</table></div>
</div>
</div>
</div>
<div class="refsect1">
<a name="glib-Miscellaneous-Utility-Functions.other_details"></a><h2>Types and Values</h2>
<div class="refsect2">
<a name="GUserDirectory"></a><h3>enum GUserDirectory</h3>
<p>These are logical ids for special directories which are defined
depending on the platform used. You should use <a class="link" href="glib-Miscellaneous-Utility-Functions.html#g-get-user-special-dir" title="g_get_user_special_dir ()"><code class="function">g_get_user_special_dir()</code></a>
to retrieve the full path associated to the logical id.</p>
<p>The <a class="link" href="glib-Miscellaneous-Utility-Functions.html#GUserDirectory" title="enum GUserDirectory"><span class="type">GUserDirectory</span></a> enumeration can be extended at later date. Not
every platform has a directory for every logical id in this
enumeration.</p>
<div class="refsect3">
<a name="GUserDirectory.members"></a><h4>Members</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="300px" class="enum_members_name">
<col class="enum_members_description">
<col width="200px" class="enum_members_annotations">
</colgroup>
<tbody>
<tr>
<td class="enum_member_name"><p><a name="G-USER-DIRECTORY-DESKTOP:CAPS"></a>G_USER_DIRECTORY_DESKTOP</p></td>
<td class="enum_member_description">
<p>the user's Desktop directory</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="G-USER-DIRECTORY-DOCUMENTS:CAPS"></a>G_USER_DIRECTORY_DOCUMENTS</p></td>
<td class="enum_member_description">
<p>the user's Documents directory</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="G-USER-DIRECTORY-DOWNLOAD:CAPS"></a>G_USER_DIRECTORY_DOWNLOAD</p></td>
<td class="enum_member_description">
<p>the user's Downloads directory</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="G-USER-DIRECTORY-MUSIC:CAPS"></a>G_USER_DIRECTORY_MUSIC</p></td>
<td class="enum_member_description">
<p>the user's Music directory</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="G-USER-DIRECTORY-PICTURES:CAPS"></a>G_USER_DIRECTORY_PICTURES</p></td>
<td class="enum_member_description">
<p>the user's Pictures directory</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="G-USER-DIRECTORY-PUBLIC-SHARE:CAPS"></a>G_USER_DIRECTORY_PUBLIC_SHARE</p></td>
<td class="enum_member_description">
<p>the user's shared directory</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="G-USER-DIRECTORY-TEMPLATES:CAPS"></a>G_USER_DIRECTORY_TEMPLATES</p></td>
<td class="enum_member_description">
<p>the user's Templates directory</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="G-USER-DIRECTORY-VIDEOS:CAPS"></a>G_USER_DIRECTORY_VIDEOS</p></td>
<td class="enum_member_description">
<p>the user's Movies directory</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="G-USER-N-DIRECTORIES:CAPS"></a>G_USER_N_DIRECTORIES</p></td>
<td class="enum_member_description">
<p>the number of enum values</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<p class="since">Since: <a class="link" href="api-index-2-14.html#api-index-2.14">2.14</a></p>
</div>
<hr>
<div class="refsect2">
<a name="g-dirname"></a><h3>g_dirname</h3>
<pre class="programlisting">#define             g_dirname</pre>
<div class="warning">
<p><code class="literal">g_dirname</code> is deprecated and should not be used in newly-written code.</p>
<p>use <a class="link" href="glib-Miscellaneous-Utility-Functions.html#g-path-get-dirname" title="g_path_get_dirname ()"><code class="function">g_path_get_dirname()</code></a> instead</p>
</div>
<p>Gets the directory components of a file name.</p>
<p>If the file name has no directory components "." is returned.
The returned string should be freed when no longer needed.</p>
<div class="refsect3">
<a name="g-dirname.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>file_name</p></td>
<td class="parameter_description"><p>the name of the file</p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="g-dirname.returns"></a><h4>Returns</h4>
<p> the directory components of the file</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="GFormatSizeFlags"></a><h3>enum GFormatSizeFlags</h3>
<p>Flags to modify the format of the string returned by <a class="link" href="glib-Miscellaneous-Utility-Functions.html#g-format-size-full" title="g_format_size_full ()"><code class="function">g_format_size_full()</code></a>.</p>
<div class="refsect3">
<a name="GFormatSizeFlags.members"></a><h4>Members</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="300px" class="enum_members_name">
<col class="enum_members_description">
<col width="200px" class="enum_members_annotations">
</colgroup>
<tbody>
<tr>
<td class="enum_member_name"><p><a name="G-FORMAT-SIZE-DEFAULT:CAPS"></a>G_FORMAT_SIZE_DEFAULT</p></td>
<td class="enum_member_description">
<p>behave the same as <a class="link" href="glib-Miscellaneous-Utility-Functions.html#g-format-size" title="g_format_size ()"><code class="function">g_format_size()</code></a></p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="G-FORMAT-SIZE-LONG-FORMAT:CAPS"></a>G_FORMAT_SIZE_LONG_FORMAT</p></td>
<td class="enum_member_description">
<p>include the exact number of bytes as part
    of the returned string.  For example, "45.6 kB (45,612 bytes)".</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="G-FORMAT-SIZE-IEC-UNITS:CAPS"></a>G_FORMAT_SIZE_IEC_UNITS</p></td>
<td class="enum_member_description">
<p>use IEC (base 1024) units with "KiB"-style
    suffixes. IEC units should only be used for reporting things with
    a strong "power of 2" basis, like RAM sizes or RAID stripe sizes.
    Network and storage sizes should be reported in the normal SI units.</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="GDebugKey"></a><h3>struct GDebugKey</h3>
<pre class="programlisting">struct GDebugKey {
  const gchar *key;
  guint	       value;
};
</pre>
<p>Associates a string with a bit flag.
Used in <a class="link" href="glib-Miscellaneous-Utility-Functions.html#g-parse-debug-string" title="g_parse_debug_string ()"><code class="function">g_parse_debug_string()</code></a>.</p>
<div class="refsect3">
<a name="GDebugKey.members"></a><h4>Members</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="300px" class="struct_members_name">
<col class="struct_members_description">
<col width="200px" class="struct_members_annotations">
</colgroup>
<tbody>
<tr>
<td class="struct_member_name"><p>const <a class="link" href="glib-Basic-Types.html#gchar" title="gchar"><span class="type">gchar</span></a> *<em class="structfield"><code><a name="GDebugKey.key"></a>key</code></em>;</p></td>
<td class="struct_member_description"><p>the string</p></td>
<td class="struct_member_annotations"> </td>
</tr>
<tr>
<td class="struct_member_name"><p><a class="link" href="glib-Basic-Types.html#guint" title="guint ()"><span class="type">guint</span></a> <em class="structfield"><code><a name="GDebugKey.value"></a>value</code></em>;</p></td>
<td class="struct_member_description"><p>the flag</p></td>
<td class="struct_member_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
</div>
</div>
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